'Whistling' in the Bible

Why did you sit among the sheepfolds, To hear the whistling for the flocks? At the watercourses of Reuben There were great searchings of heart.

And this house will become a mass of broken walls, and everyone who goes by will be overcome with wonder at it and make whistling sounds; and they will say, Why has the Lord done so to this land and to this house?

The LORD will signal for nations far away, whistling for them to come from the ends of the earth. Look how quickly and how swiftly they come!

To make their land a horror, [an object of] whistling for eternity. All [who] pass by it will be appalled, and he will shake his head.

All your haters are opening their mouths wide against you; making hisses and whistling through their teeth, they say, We have made a meal of her: certainly this is the day we have been looking for; it has come, we have seen it.